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Nadya [2.5K]
3 years ago
8

If a=8 and b=4, evaluate the following expression:2a−3b​

Mathematics
2 answers:
34kurt3 years ago
8 0
The answer is equal to 4

2(8)-3(4)

16-12=4
Nata [24]3 years ago
7 0

Answer:

4

Step-by-step explanation:

2(8)-3(4)

16-12

4

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-412-(-223) worked out
shutvik [7]

Answer:

-189

Step-by-step explanation:

Remember to follow the rules of signs:

- If there are two positive signs next to each other, you add:

- If there is one negative sign and one positive sign next to each other, you subtract.

- If there is two negative signs next to each other, you add:

- 412 - (-223) = -412 + 223

Subtract:

223 - 412 = -189

-189 is your answer.

~

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A bus covers a distance of 90km at a uniform speed. Had the speed been 15km/hour it would have taken 30 minutes less for the jou
Brrunno [24]

Answer:

Step-by-step explanation

Let's say d = distance, r = speed and t = time

We know the distance formula is :

distance = speed x time

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Since d = rt,

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This means the time taken for the bus to complete the journey at 15km/hr would be 6hrs.

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So we can say t = 6.5 hrs , and we know d = 90

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